Nearly Ferromagnetic Spin-Triplet Superconductivity
Spin-triplet superconductors potentially host topological excitations that are of interest for quantum information processing. We report the discovery of spin-triplet superconductivity in UTe2, featuring a transition temperature of 1.6 kelvin and a very large and anisotropic upper critical field exceeding 40 teslas. This superconducting phase stability suggests that UTe2 is related to ferromagnetic superconductors such as UGe2, URhGe, and UCoGe. However, the lack of magnetic order and the observation of quantum critical scaling place UTe2 at the paramagnetic end of this ferromagnetic superconductor series. A large intrinsic zero-temperature reservoir of ungapped fermions indicates a highly unconventional type of superconducting pairing.
S. Ran and C. Eckberg and Q. P. Ding and Y. Furukawa and T. Metz and S. R. Saha and I. L. Liu and M. Zic and H. Kim and For full list of authors, see publisher's website., "Nearly Ferromagnetic Spin-Triplet Superconductivity," Science, vol. 365, no. 6454, pp. 684 - 687, American Association for the Advancement of Science (AAAS), Jan 2019.
The definitive version is available at https://doi.org/10.1126/science.aav8645
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© 2019 American Association for the Advancement of Science (AAAS), All rights reserved.
01 Jan 2019
U.S. Department of Energy, Grant DMR-1610349